Mine car



2 N fnvenfor MINE CAR J. A. HEBB ET AL Original Filed Nov. 6,

Sept. 16

NNMWN R E V5574; asses:

Patented Sept. 16, 1924.

UNITED STATES PATENT OFFICE.

JOHN A. HEBB, 01E HOPWOOD, AND WILLIAM J. MGDADE, OF UNIONTOWN,

PENNSYLVANIA.

MINE CAR.

Original application filed November 6, 1919, Serial No. 336,025 Dividedand this application filed October 6, 1920. Serial No. 415,066. i

To all whom it may concern.

Be it known that JOHN A. HEBB and WILLIAM J. MODADE, citizens of theUnited States, residing at I-Iopwood and Uniontown, respectively, in thecounty of Fayette and State of Pennsylvania, have invented certain newand useful Improvements in Mine Cars, of which the following is aspecification. v

Our invention consists of an improvement in mine cars, and particularlyin the braking mechanism therefor. It has in view to provide means forbraking the car from eitherend so as to avoid the necessity of standingon the front end of a car with the attendant risks. Ordinarily, mine carbrakes are operated through levers, cranks, and rigid pitmen, so that ifa braking lever is mounted at either end of a car and connected with thebrake shoe mechanism, operation of either lever will transmit undesiredmovement to the other, resulting in jamming or straining of the parts,or the necessity of releasing before action. Our invention obviates allsuch objections, and renders it possible to operate the brakes fromeither end without disturbing the operative lever at the other end. p Wehave shown the operating levers at each end portion of the car, atdivergently opposite side portions thereof, connected to cross rockshafts adapted to transmit the braking pressure through the connectedmechanism hereinafter described. Wealso show a modified arrangement oflevers, one at the side near the end of the car, and the other arrangedacross the opposite end, and each connected to common actuatingmechanism. I

Thepresent invention is a division of the subject matter of our priorapplication Serial No. 336,025 filed Novemberfi, 1919.

I In the drawings, illustrating preferred embodiments of the invention:

Fig. 1 is a side view in elevation of a mine car provided with ourimprovement;

Fig. 2 is an end view of the same;

Fig. 3 is a perspective detail view showing the actuating connectionbetween the leverand rock shaft;

Fig. 4 is a similar view showing'a modified arrangement utilizing, aside lever and an end lever at opposite end portions of the car.

Referring to the drawings, 2 is the body of the car of usual. design,mounted on wheels 3 and provided with a brake shoe 4 at each side, ofwell known form. Said shoes are mount-ed for vertical adjustment towardsand from the wheels 3 by abolt 5 and a connected lever 6? of a rockshaft 7 The rock shaft is mounted in suitable bearings 8 along the sidesof the car, and each rock shaft has at each end a lever arm 9 foroperation together'by either one of two main leverslO and theinterposedmechanism shown. Car 2 is of the end dumping type, for which reason thelevers 10 are located at the diagonally opposite sides of the car, onenear each end and within reach of an operator standing on the endplatform. Each lever 10 is connected to a cross rock shaft 15 extending,across under the car at each end, in bearings 16 and has a lever arm l3'simila'r to arm 13*. Each arm is connected by chain 14 to arm 9 'of therock shaft at each side ofthe car, so that operation of either lever 10'will simultaneously exert tension on the chains and actuate both rockshafts 7 to depress the brake shoes to engage the wheels. Levers 10 aremounted in guards 12 and suitable ratchet or other type of holdingmechanism may be employed therewith, if desired.

7 In the drawings, both the levers 1 0 are shown in released position.In order to set the brake, the operator has only to pull the 7 lever 10nearest him toward the end of the car. This will rock cranks 1 3? andv13 downwardly, pulling down on the flexible connections on chains 14?,moving. cranks 9 onfshafts 7 a in a corresponding direction.

Such movement of cranks 9 rocks shafts 7 a in a direction to force.bolts 5 downward,

thereby causing shoes. P to engage .the wheels. Once a lever 10?, is somoved, it may be held in set position byteeth on members 12* untilreleased. I l

By reason of the flexibleconnections 14 'm'ovement of'one'lever10?" willnot effect ing Wheels, of a brake therefor including actuating mechanismmovable in atransbrake shoes, operating mechanism for the Versedlrectlon for actuating said brakes.

brake shoes, a lever near one end of the car In testimony whereof Wehereunto aflix 10 connected with said operating mechanism oursignatures. 5 movable in alongitudinal direction for actuating thebrakes, and a Second lever at JOHN A. HEBB. the other end of the carconnected With said WILLIAM J. MODADE.

